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8253 used in Commodore and Amiga equipment

IC number
8253
IC function
Timer

Component documentation
IC numberManufacturerDocumentation
8253IntelNot available
8253AMDNot available
µPD8253NECNot available

Component versions
IC numberPackageSpeedCBM part numberCBM part description
P8253-5, µPD8253C-528-pin DIP5 MHz380202-01IC, 8253-5 Timer 5MHz
µPD8253C-228-pin DIP

Positions
DevicePositionsPackageSpeed
A1060 main boardU24DIP5 MHz
PC-10 CPU boardU71DIP5 MHz
PC-10 combined boardU16DIP

Pinout
PinTypeName
1InputCS_
2InputWR_
3InputRD_
4..11I/OD7..D0
12..13I/OCAS0..CAS1
14PowerGND
15I/OCAS2
16I/OSP_/EN_
17OutputINT
18..25InputIR0..IR7
26InputINTA_
27InputA0
28PowerVCC

Copyright © 2004 Ronald van Dijk - All rights reserved
Last update: 20 March 2004